A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, Bronchiectasis: Causes, Symptoms, Treatment & Prevention Tobacco Smoke, Vaping, and Asthma AAFA.org E Cigarettes and Cardiopulmonary Health: Review for Clinicians Circulation Dangers of Youth Vaping Fact Sheet Oklahoma Tobacco Helpline Vaping Tied to Bronchitis, Dyspnea Risk in Young Adults RT